10 mm hex nut cannot be seen due to presence of padding. two relay brakets are held by the two nuts one is 8mm and second one not visible is 10mm. 8mm is nut is easy to remove. but 10mm nut is removed by using extention and feeling the nut. There is not way you can see that because itz way back. 6" or longer extension will do the job. once you have bracket out then it is easy task. remove the relays using small 8mm nut(this 8mm nut is that hold relays in bracket) and replace with new one. While I was changing the relay, I droppped 10mm nut in back. I didn't bother to put that back. I only used the 8mm nut to hold the relay braket in place. I have pic at home that i will post that later.
2005 Triumph Bonneville T100 (Black/white) [Sold]
2007 GL450 (Dersert Silver)
2009 Toyota Corolla (Metallic Silver)
2002 Tundra V8 - 2WD (Desert Sand)
1995 MB E420 (Silver Smoke) [crashed, now resting in peace at Silverstar Recycling Center]